A well-known sporting man from St. Louis, who was in the city for a few days, states that it would not surprise him in the least to see the Browns and Maroons consolidate and play as the St. Louis Club in the National League. He also said that ball patrons in that city are under the impression that some sort of a deal is at present underway, and that Von der Ahe would rather be in the League than in the Association, the permit to play Sunday games being all he desires.-From The Sporting News, December 18, 1886
There were always rumors floating around about the Browns jumping to the National League but this is the first I've ever heard of a Browns/Maroons consolidation. I would guess that, in the best tradition of European football, they could have been called St. Louis United.
Of course, the idea is ridiculous. The Maroons were in the process of collapsing and the Browns were at the height of their success. If the Browns would have joined the NL for the 1887 season, it would have happened by brushing aside the Maroons not by any type of merger with them.