Hopefully they announce the expansion on June 12th. I'd be lying if I didn't say I really want another Hot Wheels expansion. Lego wasn't horrible and the brick challenges brought accolades with them but the map was a bit of a letdown.
An update enabling the super-basic RT in-game as well as higher settings for draw distances for PC players would be nice too. The lighting in the game is top-notch, the game is really only held back by the draw distances and low resolution reflections. I'm also not sure why the headlight effects are deactivated during the daytime. On a real car the effect seen at night where the headlights illuminate the plastic lenses themselves doesn't go away just because it's daytime nor does the light patch on the road the headlights create. It's a strange decision as the effect makes the lights look much more realistic.
I was super stoked to see the Lightning included in the game, hopefully down the road they'll get the SVT Contour/Mondeo ST200 in the game. The car was a pretty important car for Ford so it's odd it's never seen a Forza game.