Okay, the idea I had was a Nanoha idea (because, like with my Exalted idea, I got bored and started to watch Nanoha again). The crossover begins as illustrated about, with Takato, Jenrya, Juri, Ruki, and Ryo being sucked into a new world. In the process, their Digimon devolve quickly like they do at the end of Tamers as a side-effect of Operation Doodlebug and the Juggernaut program--but it doesn't reduce them completely, due to the differences between Digimon and the D-Reaper. What I figured would happen would be that they'd return to Digi-tama form and enter their partner's Digivices as Eggs, like Guilmon in the first episode. The intended result was that Digivices would eventually act similarly to Devices, but I'll go into that in a bit. Depending on what one wished to do with this idea, what happens next could go in many directions. With Dimensional Travel being completely uncovered territory in this regard, one could chose pretty much any point in time they wanted to drop the Tamers off. Doing it during the original series, A's, or Strikers would be easy enough... Or you could go a step further. Instead, they could land in Ancient Belka, before or during the Saint Unification War. I kind of prefer this option as it avoids being just a rehash of canon + the Tamers (which isn't necessarily what would happen if they entered immediately into the series, but could happen nonetheless), so I'll go into it in a bit more depth. If they land in Ancient Belka, they land in a dangerous period--a beautiful, grand Magitech Empire, but one on the verge of collapse. They start as strangers in a strange land, on an unfamiliar planet in an unfamiliar universe, having just been shunted out of the Dimensional Sea with no obvious way back. Beyond the original (jarring) consequences of being booted into a new Universe with nothing but the clothes on their back in the middle of the Warring Ages as the Belkan Empire expands across the multiverse, they soon draw attention due to their ability to Matrix Evolve with their partners (Guardian Beasts, in the Belkan's eyes) with their Digivices (which the Belkan's consider Devices) into monstrously powerful forms and Evolve their partners into bigger forms as well. The Belkan Empire learns of them after a few incidents where they use their power, for whatever reason (perhaps simply to help people), which results in the stories first conflict as they wish to draft the Tamers into their war for Conquest. The Tamers are almost definitely reluctant at first, but can't help but grow interested after learning of Magic and the Belkan's ability to travel through Dimensional Space, realizing it's their best (perhaps only) chance at getting home. This eventually results in them joining the Belkan army, if reluctantly, furthering the Empires goals (likely grudgingly) in return for it helping further theirs. It is probably during this time period that several interesting discoveries are made for the Tamers. The first of these is concerning magic. Naturally, at the beginning, the Tamers have no Linker Cores, but by fighting people who do have those things many times, they slowly develop them, in a way similar to loading data. The maker of Tamers, Chiaki Konata, described it as follows: In this way, by fighting and analyzing opponents that use Magical Cores many times, the Tamers (also made of data, due to the Holy Beast's gift) slowly develop artificial versions of their own and become able to learn and use magic. This isn't an overnight process, of course, and may take years, but it does happen. Entering the barren Digital Networks of the Belkan Empire and absorbing data may facilitate this process and the Digivices may modify themselves as well. The second discovery isn't so much a discovery as it is a realization of the implications of what they already know--Digimon do not age and (at least within their partners Ultimate Forms) neither do the Tamers. But back to the Empire. Understandable uncomfortable with the whole 'conquer worlds' thing, the Tamers, rising in the ranks, try their best to curb its excesses and have the conquered people treated fairly, only kept from rebelling outright by their need for the Empire if they want to return home (though when nobodies looking, who's to say how those prisoners escaped or those rebels avoided capture). Over time, as the Empires actions of Belka and other worlds grow more extreme, so do their rebellions, though the Empire collapses under the pollution and destruction of it's homeworld before they reach the point of outright leading a revolution. When the Saint Kings return and the Unification War begins however, they find the Tamers as leaders on the other side. Sick of the empire's actions and frustrated at their own failed attempts, they've decided it's time to make a hard choice and do so--placing the lives of the people of the empire above their chances of returning. In the centuries of the war, they led the charge against the Knights and the Saint Kings, surviving that time due to their psuedo-immortality. In later ages, they'd become famous historical figures across dozens of worlds, as extremely powerful mages and leaders during some of histories darkest hours, preventing many tragedies during the War including protecting a number of free worlds from the Saint's Cradle, as well as helping organize things after the War's end. Eventually their longevity would be chalked up to lines of descendents with large amounts of magical power, though no one would ever figure out where they disappeared to a few decades after the war, never realizing that they withdrew into their Digivices and the Digital Networks to rest after the war, waiting for a time when they might have a better chance at returning home. For centuries, they rest, undisturbed...until someone finds a strange device in a temple on an out of the way world, with a gold ring inscribed with ruins that no one can translated.