Nightwing and Mockingbird

 

Out of all of DC's heroes, I think Nightwing would make a great recruit for S.H.I.E.L.D.  He's got the skills that Batman taught him, and is comfortable working within a team as well.  He's even worked in law enforcement before, so this might be a natural step.

X-Factor Vs. Solomon Grundy

 

I remember thinking the premise to X-Factor was a little odd.  The original X-Men disguised themselves as mutant hunters in order to secretly help mutants, it didn't make a lot of sense to me.  They didn't stick with that set up for too long, fortunately. 

Glad to use a Solomon Grundy image here by the very talented Scott Kolins here.  I was lucky enough to pick up a couple of original pages by him (Flash #200 inked by Doug Hazlewood and Thing: Freakshow inked by Andy Lanning):