Question about "The Aviator"

Is that a P-38 Lightning Howard Hughes/Leonardo DiCaprio is flying in the trailer for The Aviator?

Based on what I saw in the ads on TV, no. The movie vertical stabilizer profile is wrong and the engines appear to be radials.

It looks like the Hughes XF-11, an evolution of the D-2 (XP-73) project. More information is available here.