Can MS & Sony just simply make next gen fully BC?

[Cloudman]

Kerotan said:

Cloudman said:
I don't see why they can't if the tech isn't very different. The Wii wasn't that different from the GC, so it made it possible for BC. With there not being any weird tech like the cell processor in the PS3 (as far as I know), if the tech is not too different it could be possible for the PS5 to be BC I suppose.

I agree with you I'm just wondering on the legal side of things is there anything devs can do to prevent their game being available on BC. 

This is the 1st time I'm ever hearing about this. I've not known this ever being the case with any system with BC.