I have a situation that has gone haywire because of family infighting. Executor (bother of the deceased) asked me to put the 2017 1041 on extension because he was going to have some surgery. I just found out that he (executor) died at the end of June from medical complications. There was no contingent executor and now the rest of the family members are challenging the will and other actions taken by the deceased executor. One family member confided in me that the whole thing stinks and heading to court and no one knows who will be the executor of the estate or when it will be appointed. Estate has rental income properties.

What are my options to file the 1041 that was on extension assuming a replacement executor is not named?