Here is the latest batch of free digital comics from Comixology. in particular, I highly recommend the first Avengers title below. This was an example of a reboot done right with Kurt Busiek writing and George Perez drawing EVERY Avengers member past and present!
Actually, there is not a single clunker in this batch - they are all excellent reads. Enjoy!
Avengers (1998-2004) #1
The Avengers are reunited! As the founding members come together to discuss the recent wave of attacks on former teammates, Thor interrupts the proceedings with grave news: Asgard is in ruins, the Twilight Sword has been taken...doom awaits Midgard!
Avengers Assemble #1
The Avengers vs. the new Zodiac! One of the greatest Avengers villains gets reinvented for the Modern Age! A perfect jumping-on point featuring the cast of the summer blockbuster in Marvel Universe!
Avengers Prime #1 (of 5)
In the wake of the SIEGE Thor, Iron Man and Steve Rogers are forced into action, but these great heroes can't truly trust each other yet. They better start soon because something only the Big Three can handle is tearing their world apart.
Ultimate Comics Thor #1 (of 4)
Ragnorak has descended and Asgard sits at the edge of end. What will become of Thor and the Warriors Three? And what exactly does Baron Zemo, mysterious commander for the Nazis, have to do with it all?