I havent bought much DC since new 52 came out. As for Marvel, you'd really be jumping into a long developed storyline if you hop in right now. It's decent, but you may be a bit confused for a little bit.
That was a good show that adapted a lot of popular comic stories from throughout Marvel's history that would give you a good foundation for jumping into the comics. It's a good show too so it's no chore.
Actually just finished Earth's Mightiest Heroes a few weeks back and really liked it. It's part of the reason I started looking back into the animated series and movies.