I didn't watch the clip linked. I'm doing my best to stay away from seeing too much from something I plan on seeing.
The climactic blue light with lots of CG cannon-fodder thing is something that deflates these kinds of movies for me the same way that I was a bit let down by the finale of Winter Soldier despite how much I loved that one. Iron Man Three loses me with the big CG finale too.
It's the same thing when I'm disappointed whenever COLLATERAL ends with a tense chase.
Foolish of me to expect different of what is gussied up genre entertainment, but I cannot help it!
If anything, the fact that everything else about Suicide Squad seems to try to look strikingly different only makes the idea that it ends with what could be a routine finale even more disappointing. But who knows??? Maybe it'll find some new twist on that too!