Young Avengers has been one of my favourite books - I love the characters: Kate Bishop with her bow and arrow, cute gay teens Teddy and Billy, the half-Skrull Hulkling, and an interesting back story for everyone. The gorgeous Jim Cheung art did no harm, either.
I'm less familiar with Runaways, though I did read the early run of that comic - and enjoyed it. But Brian K. Vaughan never entirely pulled me in, and I kept forgetting characters' names and powers. Then the trip to 1907, while visually interesting, didn't seem to have anything to do with the main theme of the story... I was somewhat at sea.
Because they are all teens, putting them together with the Skrull invasion storyline works well for Secret Invasion: Runaways/Young Avengers. I'm becoming more and more impressed with Christopher Yost's writing - his dialogue is snappy and his characterization is delightful. I was delighted to see we have a new Skrull character, Xavin or Xavina. This delighted me (have I mentioned how much I like Skrulls?) but I was confused as to whether Xavin was male or female, and the combination of Skrull physiognomy and manga-style art didn't help. Then I was even more delighted to learn Xavin had been a boy who became a girl for the sake of his Lesbian lover, Karolina. Way cool.
Actually, the art by Takeshi Miyazawa is terrific, and I'm all the happier to learn that Miyazawa is Canadian.
The plot? The kids fight Skrulls: they are outnumbered, outgunned, and disorganized. It doesn't help that one of their number is a lost Skrull half-breed Prince, another a renegade Skrull warrior. But it's fun to read about,and I always enjoy a revisitation of Teddy's Skrull heritage and his identity problems.
Besides, I really loved Molly, a lovely character with great hats, who sometimes reminds me of Katie Power, another superhero I like, though Katie is much younger.