They need SuSe and the clout they have to make sure that they have a suitable place to run all of their other software.
Seriously, VMWare is only interested in SuSE. They want a complete stack to compete with Microsoft's and Red Hat's VM product lines. I believe they recently picked up another company to fill another role in that stack, but I'm far too lazy to look it up right now. They do offer a version of Linux called Just Enough OS, but I've heard nothing spectacular about it.
Novell's other software is being slavered over by a rumoured 20 companies or so. Granted, one of them wants it for legacy compatibility, but I don't think we can call their other products dead yet. And, oh, I WISH we could... :)
This is following Novell's earlier buyout offer that they rejected on the condition that they would procure other suitors to appease the shareholders. I thought they were off their rocker when they rejected that offer, so I'm glad they've made good on their promise.