Sorry, I see Venom/Testament (GGX) everytime I see that vid.
Maybe it's my years of playing GGX, maybe it's my years of playing MvC2 competitively.
Again, I see where you'd make the connection. The animations look similar but only when compared to each other. When viewed apart and compared otherwise, it's visibly different.
-----Analysis------
In the Doc Strange video - :35 his throw feels more like Venom's Que Ball grab and direction misdirect toss than Mag's quick grab and toss.
The teleport in :42 is another of Venom's moves. Something that Mag's lacks and is a HUGE proponent to a character's gameplay. Teleport moves alone can completely revolutionize the way the character works.
The super move in :46 supercedes the super move being thrown at him, much like Venom's and nothing like Magneto's which are all eliminateable.
At :52 with the Air Mines is where he CLEARLY pull away from anything Magneto is going to offer. The Air Minefield gameplay is so far beyond that of almost any character in almost any fighting game that it's a very unique and easily noticeable gameplay. Venom and Testament pretty much live off the style. Nothing in MvC series comes close.
At :55 there is a "bubble" move that hits multiple times as it slowly charges toward the enemy. That is EXACTLY what Venom's main super move does. It charges, in a large glowing ball, towards an enemy and strikes at multiple hit boxes as it flows through the character. Again, Magneto has nothing of this sort.