Well, hopefully, our doctrinal differences can be resolved.
At least among the German princes we were pretty close in A.D. 1530. 21 of the 28 articles of the Augsburg Confession were on points of agreement, including justification, repentance, and the Eucharist.
There are detractors now on both sides but I believe that the signing of the Joint Declaration on the Doctrine of Justification was either the beginning of the end (or the end of the beginning) of the reformation.
Note the lower case "r".