>>39317845If Corviknight's stats shown at E3 are the final ones, then it'll have lower stats than Skarmory. It was calculated to be 102/80/98/56/78/60 with a BST of 474.
Assuming for the sake of consistency (ha ha ha) that Pokemon can only use their Giga forms if they're fully evolved (such as Pokemon using Mega Evolutions), that would mean Corviknight would be pretty weak for a fully evolved Pokemon and rely on its Giga form to be useful.
And that's all before we find out if previous-generation Pokemon get Gigas, or how much of a stat boost Gigas actually provide. And then how it will effect other aspects of battle, such as double battles (if they're even in the game, anyway).