I'm skeptical of a super nino developing in 2026-27. They normally don't develop that strong on the first try. 2015-16 is a very good example. Some models were predicting a possible strong el nino as early as 2012-13.
I think if there's a super el nino, it will more likely happen in 2027-28. If the el nino happens in 2026-27, I think it will be capped at a high end moderate, possibly low end strong. (We also cannot count out the possibility of a double-year el nino, peaking during the summer, like 1986-88.)