Aren't The Streak matches too far into their last days to be wasting them on matches already done?

Yeah, I think so. That's why I ruled out 'Taker vs HHH at WrestleMania, and Cena, Jericho and Orton (even though Cena + Jericho have never faced Undertaker as I can remember). But now WWE just don't have anyone that is capable to make a good match with Undertaker, and if he doesn't come back before WrestleMania this year, there'll be no Streak match, and then sooner or later no Undertaker, which is sad.