I'm gonna get flamed for this but here goes...
Why doesn't Lotus just sign up for gen. V LS 500hp+ motors from GM for the Esprit (or whoever buys the engines division). It's reliable, 100lbs lighter than the Lexus LF-A, MUCH cheaper, could be geared to return relatively high MPG in a lighter more aerodynamic vehicle. More importantly an LS Esprit would inherit a massive fan base throughout the US and have access to huge aftermarket support/tuning.
Now I know I'm gonna get flamed for this but look past gut reactions and prejudices, how much better is a massively technical V10 with prohibitive servicing costs than a proven and much loved lump like the the LS?
Just because it's made in Detroit doesn't mean it's crap...
I would much prefer to see an Esprit with LS power and I reckon most of Esprit fans of old would too.
The Corvette isn't my cup of tea but the LS is a bloody good engine.
Lotus has as much a connection with GM as it does with Toyota (more so maybe).

My $0.02