I'd like to see a language with the power of C++ without some of its complexity. As noted elsewhere in the thread [1], there are a lot of features that just aren't necessary for the combination of performance and expressiveness C++ offers; on the other hand, while C is simple and can usually offer equal or better performance, its lack of templates hurts its expressiveness badly.
But Java or JavaScript? If your performance needs are satisfied by those languages, great, but you're not the target audience - not today, anyway, now that those languages exist and are reasonably fast. But if not, good luck trying to beat the JVM into doing what you want. [2]