FTG & Madara
Of course, there are a lot of associations between Madara/Tobi (I maintain my skepticism) and Minato. They have gone head to head. They both use powerful space-time jutsus. ETC.
But, one thing we have yet to see is Tobi using any real offensive abilities. Really, the only way he has been taking people out is with his absorption technique. (Which, I think the absorption technique might be the real function of the Moon eye plan, but that is another idea all together)
Now, my question is, could FTG escape the absorption technique?
As in, if somebody (Minato or maybe Naruto if he learned the technique) was absorbed by Tobi, could they FTG out of it?