User blog comment:Forrestib/Crossover/@comment-25405817-20141220023541/@comment-5041507-20141220051808

73.42.187.52, your definition of a crossover seems severely limited to me. If your problem is that the animation style is different, Adventure Time has had CGI episodes that they could take the models from, and there is at least one precendent for such a crossover with the Jimmy Neutron/Fairly Oddparents crossover episodes, of which there were several. Or if you'd rather, Who Framed Roger Rabbit is a sort of mass crossover between dozens of separate cartoon universes, all with different visual styles. It even includes our own live action world and it still all works out.

If your problem is with the laws of the universes operating differently, there are numerous crossovers I can point to as examples of such issues being worked out in various ways. The first that comes to mind is the several Judge Dredd/Batman crossovers that actually played with the fact that the Dreddverse lacks the god-level powered characters that DC has in spades. Another example is the Doctor Who/Star Trek crossover comic, which uses the incompatibility of the universes as a plot point.

My point is, a crossover doesn't mean that the two take place in the same universe, operate on the same laws, or even use the same animation style. It can be Canon and have some form of interuniversal transit that makes the connection possible.

While I do agree that the styles aren't identical, I think they are similar enough to not be too jarring. A CGI Finn would not look entirely out of place at Beacon. Likewise the Grimm would fit right in on Ooo.

One of the reasons I picked AT is because it basically establishes that there is no real "magic" in Ooo. It's all just very weird and advanced science. It and RWBY have that in common, in that Remnant also at first glance would appear to be a fantasy world.