Part of the fun in working in a big shared universe like the DCU is, well, sharing the universe. So, I can say for certain that Swamp Thing is going to have some fun encounters with other heroes and villains, although it will always be his book and his story. After all, it's his name on the cover. Issues 19 and 20 are designed to bring Alec a little deeper into the DCU and show where he stands, more or less, but I've got a whole list of things I want to do with him that don't involve the larger universe as directly.
As for the image above and the artist responsible, that is the cover to issue #19 by Andy Brase.
Soule mentions having big shoes to fill. Indeed he does. It's going to be an exciting time to see what's coming up after Rotworld.