The days of the huge "bomb trucks" have come and gone. Sure, the B-52 has some usefullness, but its long since paid for. No replacement is in the works (here in the States at least). No company will risk the huge development costs associated with a B-52 replacement and remain in business.
As for smaller types, the Joint Strike Fighter will (in my opinion) come to dominate that market, if only for the fact that it is a modular platform (read: easily modified) and development is already well on the way. Lockheed has hit a home run with Raptor and the JSF. Same old story, timing is everything.
USAF, USN and Royal Navy are committed to the type. The other NATO partners will see the financial advantage of aquiring JSF. Game over. The US taxpayers have paid for the majority of development costs for NATO's next tactical aircraft, and EU politicians aren't stupid enough to spend billions on another design. Per unit cost will drive this decision.
The best part of this story is that with the talent of the various EU partners engineering teams being thrown into the mix, JSF will continue to develop for a long time, with the resultant increases in capability and cost effectiveness being predictable. Lots of good high paying jobs for folks on both sides of the pond. A very good thing.
I could be wrong