My campaign i made up is pretty good (in my experience) and very fun! It is set after the black Gate battle if Frodo kept the ring and escaped before Gollum or Sam could stop him.
Firstly, i start off with Orcs vs The nine. It is set in Mount Doom. The objective is whoever finds Frodo and kills him first, the orcs or the nine, gets the ring and has won the game.
The next battle would be The Second battle for Gondor. After their failed attempt at destroying Gondor last time, with the ring returned to Sauron, the Orcs of Mordor have gone to re-do their strike on Gondor. The objective is to Kill Aragorn, if they are to fail, The good team repeats the black Gate Battle.
And there is more but that is the sort of Scenario Campaign I am thinking of setting up. I would like to hear your thoughts and also I have not fully thought of the consequences of each race Winning or loosing.