I don't want to spoil the story line just yet, but I can confirm Macro Berrio, Dr Halston, Cameron Zackarery, Garth Knight, Goliath, KARR, and the Juggernaut will all make a return in my story line. I have plenty of plot twists and turns to keep these characters interesting.
I can also tell you, you will see the fall of FLAG and it happens on a very personal level for Michael which in the end fuels his decision to leave what's left of the foundation until he is called back into duty for KR 2000.
I was wanting to keep this a secret but I think its too cool not to share. One of the final levels leading up to the big boss battle, will see you chasing down the flag semi. It of course has been rigged to blow and Devon and Bonnie are unaware. As Michael approaches the semi, the level begins with the semi trailer blowing up and being engulfed in flames screaming down a mountain road. Pieces of flaming debris will be flying at you along with oncoming traffic, will make it difficult for you to complete the task at hand. There are 4 check points, you must get close enough to the cab of the semi to use Micro Jam to slow it down before it reaches each check point, and finally before it reaches a bridge up ahead, which of course is blown out as well. You'll have to stop the semi and rescue Devon and Bonnie who are hiding in the "panic room" kitchen area of the Semi.
The final boss level may or may not have you boarding a Military Cargo plane as it takes off. You may or may not end up being dumped out of said cargo plane and find yourself in an action packed free fall predicament that defies the law of physics, and it may or may not involve KITT and a parachute.

I haven't finished the final boss level script just yet, but I can promise you it will be big, and will be leaving Michael all just a bit burnt out enough to say good bye.