I'm certainly digging this more then DC Nation right now.
It has a nice intro for starters and the bumpers in between were neat.
I'll agree with others, the Hawkeye bio was a tad on the long side; one section of that could have been pulled out entirely.
I do very much like how the bumpers are supporting the things going on in the individual series instead of giving you something absolutely not relevant to the series you're watching.
Beyond that the block SCREAMS Marvel where the DC Block really --- doesn't.
The one BIG complaint I had about the block is DXD 'insisting' on screaming "Marvel Universe on DXD". Is that really necessary? I'd much rather see something more Marvelish in those bumper slots. Heck, to be honest, I really don't want to see anything about the DXD live action kiddie series during the block. That can just go away :-\.
Other then that, the promos they ran for the Avenger's Movie was awesome as was the promo for Tron.
I hate to say it, but overall, this block feels like it would be so much better on Saturday nights with Transformers Prime over on The Hub.