Let me say this: I don’t think crossovers are not inherently bad. Look at Smash Bros. I just don’t think they’re very creative. This is because you throw in characters from different universes and you have to combine their universes, and somehow create a story involving all of them and often explain how or why they came together. Worse if you try to include a completely new bad guy who exists solely as something to be opposed by the existing characters.
With Super Smash Bros., at least, it was fun, and, admittedly, original, mainly in gameplay. Hell, it was cool. Playstation All-Stars Battle Royale, on the other hand, is nothing other than an attempt by Sony to try and capitalize on Nintendo’s idea. Somehow, when Nintendo did what they did, it was great and original, but when Sony tried, it’s very unoriginal. And the nature of the crossover is even more ridiculous, and a heavily out of place roster. The only thing Sony did was pull a bunch of their characters together and fight each other in a manner that nigh copies Smash Bros.
Even Smash Bros., though, can be quite uncreative in the way of story, but that is mainly because it’s a fighting game, a genre that in general suffers from lacking in story.
That aside, I think crossovers just aren’t very creative. If you can find me a crossover that is, be my guest. But that doesn’t make them bad. Gameplay-wise, they can actually do great. I just wish the story could be more tolerable in its quality.
By the way, Shin Megami Tensei x Fire Emblem? What is Atlus thinking?