The Mark I of this lens is so good, I don't see why they are releasing a MarkII without IS. With video being a big focus with DSLR, I think IS is becoming a requirement at this focal length in a zoom...
If they plan to match and beat Nikon's 24-70, they need IS
and internal zoom/focus. I'd even prefer having internal zooming and focusing before IS. But that's just me.
