See JWs have said time and again Jesus died once for all time... A quote from Hebrews.
Okay rule out humn-like aliens what about animals plants and microbes... I once had a hot fight with an elder when I still believed that here was no reason to doubt alien animals etc. Yet NOT based on any WT article witnesses reject this often.
Lets suppose say in a month microbes are found on Ceres (I doubt it will happen but let's roll with it) They are living as much as our cells are and reporduce... okay what would MOTHER say in the magazines when millions of Jehovah's Witnesses demand to know why Jehovah created microbes on a dwarf planet?