Ok, since we have word that Tatsunoko vs Capcom is coming to the Western market (at the very least, the states, but usually any game that shows up in the states is bound to head to the U.K. shortly after), I figured why not Namco X Capcom? I mean, what problems could exist that Capcom has decided a "screw it, let's release it anyway" situation? As far as the characters not being known, well how many Tatsunoko characters did you know about before the game's release (or announcement), and really, there aren't THAT many unknown characters in NxC, just a couple characters but a majority of the characters that appeared have seen SOME form of a release known world wide (Namco gave one or two of the Soul Caliber characters an alternate costume to look like Valkyrie so people probably know about that game simply because of the alternate costume), and they've already done a cross-over game with companies like Marvel and SNK (SNK being a company that have made games themselves essentially putting them in the same position as Namco), and they don't even have to bother with voice actors, because HOW many times have they given English voices to their characters? Granted there are more speaking parts in NxC than any other cross-over game, the fact is the fans really don't care about changing the voices.
Why not make NxC again on the Wii and release it in the states? I mean, graphically speaking, there's not THAT much of a difference between what the PS2 and Wii are capable of doing on a general level, and the controls are the basics with the fighting being even simpler since it's just a combination of up, down, left, or right plus a button.
For profit purposes, putting it on the Wii eliminates Monolith Soft's part because since they're owned by Nintendo, they eventually get the money anyway, and then that just leaves Bandai-Namco and Capcom, and I'm sure splitting it 50/50 is how Capcom usually handles their Cross-over titles, or something to that effect. Granted this is assuming that NxC gets made on the Wii, but there HAS to be some way in order to get it out on the PS2. Though, I highly doubt it since Nintendo would want a piece of the pie and since they own Monolith Soft, and thus own Reiji and Xiaomu (the two main characters created specifically for NxC), it's now a three-company game ownership with the only way to appeal to one company is to remake the game on their system, thus eliminating any chance of it showing up on the PS2.