While I would like to see a B24 eventually, I think it would be a poor choice in the near term.
I think Pyro once told me that to do a bomber, it takes as much art resources (ie time to develope) to build a bomber with 4 pilot/gun positions as it does to do 4 fighters. Thats why we have so few bombers.
Right now we need a Japanese bomber (no not the Betty), a Russian bomber, and for those masochists out there, maybe even an Italian bomber

The B24 just doesnt' do anything significantly different that the B17 doesn't already do. The same for the B25, its functionally the same as the B26.
Oh, and anyone who thinks that the Ki67 is going to be an easy kill like the G4M Betty, is in for one wicked suprise.

Depending on which model Pyro does, it has a mix of 20mm cannons and 12.7mm MG's as defensive guns, and its much faster than any true Buff (ie no mossie) we have in the arena.