Oh heck no, the battlescapes were horrible. Too much molding which made them not universally usable. Rather see mega just invest in some large geneneric base plates with terrain you can build up. Lots of plants, rocks and other terrain pieces included.
I think you'll find that the Hayabusa is not able to be produced now since the design is Temco's. It only appeared in Halo3 as a nod to Temco for including a spartan in their game.
Yes, the panel showcased a new line of singularly packed highly detailed named Halo figures and the next signature series build, the Halo 5 version of the Spirit dropship. The panel video is still being worked on, hopefully it will be up soon.