Trask was not riding atop a dragon.  While it would've been - by his hero persona's standards - a pretty epic thing to behold, he decided that it was a far better thing that their targets see a bunch of young heroes riding atop a dragon...and then [i]completely miss[/i] the attacker from above.  He spent a few seconds analyzing the situation, noting the argument that they were about to interrupt, the everyone's positions relative to one another, and all their strengths and arsenal.  And on 'GO!', he descended to press his attack.

[center][youtube]https://www.youtube.com/watch?v=Tn58-Nl9NYw[/youtube][/center]

We will point out that Zen explained what he'd be doing beforehand to Animal Man.  It was just his hero persona to seem like a showboater.

A black-and-red armored figure isn't easy to spot in the night sky.  Maybe not impossible, but in a choice between seeing that high up and seeing a group of people on a big green dragon, it's fairly obvious who's getting the immediate notice, the preface of Zen's plan as he flew down in Trask form.  You might ask who it was that Trask was going for: The bulk of the gang or the airborne Queen?  The answer was both.  Trask's flying form was built for multi-tasking.  And so, when he laid down a suppressing fire of those pounding pulse blasts to hit or distract Jack, Ten, and King specifically with his arm weapons, there were a pair of [i]POW[/i] shots from the devices on his shoulders as he flew by.

[color=ed1c24]"Hang on, lady!  We go for a ride!"[/color]

The shoulder-mounted grappler guns had gripping claws that were going for both Queen and Card, either to grab-and-drag her off, or to pull the flying carpet of a card out from under her and thus remove her escape options.  He had the range for all of this.  Would it all go according to plan?  We'll find out.  All Trask knew was that if Queen ended up falling upteen-plenty stories, he'd have to be the one to go get her, but at least that would leave the rest of the team free to do their part.