I don't know, if Cosworth can keep coming on strong, I wouldn't mind seeing Williams Cosworth again.
So let's see, Honda buys BAR (or will eventually)
BMW buys Sauber
So next we have... Mercedes buying Jordan? or maybe just buying McLaren outright? Surely they don't want to outdone by their archenemy from Munich.
This should also increase BMW's stake in the GPWC which, after Indy, might actually become a reality.
I think it's a good thing really. BMW have always been impatient, but with the power struggle between them and Williams, it was going to be difficult to work out. This way they can invest all they like, and help pull another team up to the higher levels.
As for Williams - not sure about Renault giving them engines. I'd be more inclinded to think of them talking to Honda. BAR have been all over the place this year, so giving an engine deal to Williams might be in Honda's mind to kick start BAR again. (Don't Honda own most of BAR now?)
Then, there's always the VW/Audi group to chase for involvment