I have my theories on why this isn't released yet...It could be something that is material information but unknown whether or not it will materialize. I've seen things like this happen in regards to permits or other legal items. The great thing is this was done at the company's request, so likely it will be positive news.
Don't worry, no one will get this news before anyone else. The material news will be released eventually and then at some point after that they will remove the halt (probably within two hours).
With so many positive irons in the fire for UCore I'll bet this will be something worth the wait.
Good luck to all,
x