There are a few rhubarb recipes on this board. I have yoppers rhubarb wine going right now, as well as The Weebs "Big Bold Rhubarb Wheat" (https://www.homebrewtalk.com/f70/big-bold-rhubarb-wheat-281705/)
Granted they are both in primary, so I can't tell you first hand how they turned out, but...