I saw this hilariously awful rendering from Global of what the skyline would look like without the Saddledome...
https://twitter.com/user/status/1154904429767905280
Apparently, not only will the Saddledome be torn down, but so will the Corral and the entire BMO Centre and the Casino. Good news though, for some reason, the Enoch Sales house will be rebuilt and put in the middle of the BMO Centre land. Unfortunately, it looks like it will be rebuilt to the state it was in before it burned down.
Of course, this also ignores the fact that the new arena (and the BMO Centre expansion) will become a significant part of the skyline before the Saddledome is demolished.