Pretty sure BrickArms already makes or is in the process of refining their design of a Light/Identity Disk. Yes, I am aware that just because one company makes it doesn't mean no one else can but considering that the idea is basically a ring of plastic, I have a hard time seeing how there could be enough of a difference in the design to warrant BrickForge making one.
While this is true, their disc is not being sold by them and is in still "prototype" stage. Besides, chakrams are a basic design up for grabs. I know Armothe said he does want to make a chakram sometime in the future, but moreso Xena: Warrior Princess style.
As for bike, that might be a challenge, but it can be done