Tremulous's everything + BF3's 2011 graphics and sound.

Shooters today are way too focused on "real-feeling".

Basically every mashup I can think of is of the form "old game I liked" + "updated graphics and sound". WC3+modernization would be awesome, but the Warcraft universe seems bound to the bowels of WoW for eternity. New SMB Wii was a good example of what I wish there was more of.