Flight Cancelled out of IAH — What to Expect?

Had an early flight tomorrow morning that just got cancelled. The cancellation message (via email) gave very little information about next steps other than the airline will be in touch about new flight options.

Should I still plan on arriving at IAH at the same time as I was planning to for the original flight? I don't know what kind of options I will have for rescheduling but I really don't want to spend my day at the airport waiting to hear what my options are.

Any input/advice would be greatly appreciated!