IT would be a huge get; but I'm not exactly sure what the plan was with getting it last year. (i.e. WB wanting to do their thing or Universal just not planning for no IT this year.)
All I know is before the 2017 event ended, I was already being told Stranger Things was being sought after and it's very likely they are going to lock it up. Didn't hear anything about IT other than they'd like to tackle it, and that was later on.
I'm under the impression Uni would prefer IT for 2019 to market it with the sequel, but I don't know if that'll be a thing now.