Gamasutra (via French site JeuxVideo) is reporting that both Ubisoft and Warner Bros. intend to re-release trilogies of some of their more popular PS2 games on the PS3, with HD (and perhaps 3D) makeovers. Named franchises include Prince of Persia, Splinter Cell, Rayman, and Mortal Kombat - and retail listings of the packs have been spotted.
TheSixthAxis recently found a listing for the Splinter Cell Trilogy on Amazon France - expected in November - and one of their commenters found a similar listing of the Prince of Persia Trilogy. Neither listing is still available.
Given the success Sony has had with God of War and will undoubtedly have with the Ico and Shadow of the Colossus re-release, it's easy to see how Ubisoft and Warner Bros. would want to follow suit. Nothing is confirmed yet from either publisher, but it's starting to look like too much smoke for there not to be a fire.