I'm pretty sure SCEA said to Capcom USA: "we're announcing the PSP Go, can you guys cook us a Resident Portable logo and act like the game exists?"
The game was talked at E3 2009 only, no one from Capcom Japan recognized its existence and it was never announced outside of the Capcom Unity blog. Probably SCEA made a deal with Capcom USA and the project fell apart before anything worthwhile came from that.
And I doubt this (joke) project became RE:Revelations because I don't think Capcom Japan had been involved in any way with it and third parties knew about the 3DS only three months before E3, so I don't think Capcom was making RE

SP and in March they said fuck this, we are going to make it a 3DS exclusive. I think they'll have tried to make a multiplatform game.