I have mixed feelings. Man of Steel was a good film with a decent, modern take on the character. Henry Cavil was a great casting choice for the lead role and I'd love to see him get another shot at it. I don't see the need for a reboot with a different cast. It feels like he's being punished for Superman v Batman and Justice League, films with shortcomings that were not his fault.
I'd rather see Gunn do for Superman what he did with The Suicide Squad - retain good performers from the lackluster predecessor films but give them a good script to work with.
There were 3 generations of starships named Enterprise between TOS and TNG. Surely that's the most relevant measure of a generation for Star Trek.