let’s say you’re in D league and the your power goes over 200k during the season, but then on the last day of the season you sell some of your best equipment so that your power drops below 200k before the season ends. will you be bumped up to C league next season or stay in D?
thanks 
Your rank will be determined by the highest power your team has ever been.
For example, I was in C league for a long time and planned to stay there. I equipped some more powerful gear on my heroes to see how high my power would increase and then took it straight back off. I still got promoted for the next season.
damn okay thanks for letting me know 