It's fun to speculate, but I do agree that it's way too early to prepare for next year's rotation. Who knows what will get reprinted, as well as what will get released over the next three sets. As for what sets will rotate, I think it's safe to assume Standard will be SUM-on based on how they've rotated sets in the past.
Imagine if someone posed this same question exactly a year ago for how our Standard Format would look today. Everyone's predictions back then would have been completely wrong because no one knew what cards we would be getting in Guardians Rising and Burning Shadows. Same things applies to your question now.
Imagine if someone posed this same question exactly a year ago for how our Standard Format would look today. Everyone's predictions back then would have been completely wrong because no one knew what cards we would be getting in Guardians Rising and Burning Shadows. Same things applies to your question now.