That being said, it's a bit disappointing that there aren't more crossover games of this type, and that more of them that do exist don't make their way over here. Namco x Capcom is a treasure trove of a strategy RPG with Namco and Capcom characters galore, but it sadly never made its way west. Sure, we've gotten Capcom fighters that pitted their characters against non-gaming properties like Marvel and Tatsunoko, and there are the upcoming Street Fighter/ Tekken mash-ups, but that's not really quite the same. Crossover fighting games are a dime a dozen these days. Even Mortal Kombat got into the act. And as for Smash Bros., those games were 100% Nintendo until Brawl included all of two third-party guests.
What I really want to see is some of the major companies do what companies like Nippon Ichi, Idea Factory and Compile Heart have done several times now with titles like Cross Edge, Trinity Universe and Hyperdimension Neptunia, and go balls-out crazy with an RPG or strategy RPG that includes as many franchises from as many companies and for as wide a release as possible. An unrealistic fanboy dream, true, but also one filled with potential. And well, if smaller developers are able to not only make it happen, but also see it get an international release, there's really no reason why larger studios couldn't do the same while also having the resources to make something more technically proficient.
Video games have been around for decades, and in that time, a lot of historic games and nice franchises have come and gone. Occasionally, a bigger company will step up to the plate to do something ludicrous to celebrate that history, like Segagaga, a game that celebrates Sega's history with a once-in-a-lifetime level of self-depreciation, and one of the most glorious final boss battles ever:
(Would you believe that the majority of this game is actually a form of business simulation?) Segagaga arguably out-nerds the entirety of the Smash Bros. franchise. And sadly, it was never released in the U.S. And, like Cross Edge and Trinity Universe, it didn't exactly break the comparative bank to produce. The potential of companies like Sega, Nintendo, Capcom, Square Enix and Konami getting together to produce a cross-over game at the magnitude of a full-blown RPG is comparatively immense. Heck, even invite some of the smaller companies along for the ride, because Prinnies and Personae succeed in making everything better. Though it may not ever be a realistic possibility, and thus will forever be the subject of vivid imaginations and poorly written fanfiction, I can't help but wonder how cool it would be if something like this were to actually happen.