I see a number of people with what I think are the same issue I'm seeing.
I've upgraded to JAVA 1.10.0.2
With this version of JAVA none of my modded packs can launch. It appears that FORGE is not compatible with JAVA 10.
I can run Vanilla with no problems. I've tested minecraft versions 1.13.x and 1.12.x. Both of these ran just fine with JAVA 10.0.2.
Just a heads up for those seeing similar issues.
Cheers,
Tali