For me personally, I would love to see the Resistance series get some love. A collection with all the titles, including PSP, added together with upgraded graphics would be nice but I would really love to see a new entry into the series.
It’s that or Legend of Dragoon but that’s a real long shot.
Carnage Heart, a modernized version of this could be really fun with modern online multiplayer you could run your robots against tons of others in the blink of an eye giving you quick feedback on how your tweaks to the code affects your standings.