Well, Six Flags has still not been testing their new for 2020 ride, and their 2019 ride opened 2020, without COVID.
EL on the other hand has opened 2 Hypercoasters + 1 Megacoaster in 2 years, not talking about the supporting rides they built along it. In addition, their other 2020 ride (Zadra) has opened 2019.
I am quite sure, they would have been easily able open it in 2020, but decided not to do so due to COVID. I remember seing the area at the end of the 2018 season, it was already amazing that they have built a themed area within the following 9 months.
I just hope that they will increase the pace again, it was really great to visit a park on a yearly basis and always find new areas to explore. Currently, they appear to plan 2 hotels + a indoor waterpark, but in terms of Rollercoasters, I believe except for the Tiltcoaster, there are no public plans for now.