Other than Beto, who do the Dems have to run?
(a serious candidate—someone with better than a snowball’s chance in Falfurrias)
Realistically, I don't think anyone is going to try. It's an off-year election, and no Democrat is going to defeat Abbott. Beta will be the sacrificial lamb since he has nothing better to do.
Long term, I think Democratic statewide candidates are going to be former big city mayors and high profile (but not necessarily powerful) state legislators.