I am a bit uncertain what you're asking here, sorry. Did you ask if I think MeeGo would provide synergy to Symbian? Not a lot, maybe some depending on how popular the MeeGo phones are...
As a side note, the three MeeGo devices that Elop suggested we would get before 2014, that's the same number as phones Apple would release if they stick to their regular one year release interval; three before 2014.
Well, I'm not sure we're getting three MeeGo phones anyway. If I understand correctly the three phones Elop mentioned were planned from before he changed the strategy. I think we're getting a single MeeGo phone from Nokia. But that's just a guess.