You guys realize Titanic was nearly 20 years ago right? Since then DiCaprio has been in a series of big movies directed by Martin Scorcese (5 movies total), Clint Eastwood, Steven Speilberg, Sam Mendes, Quentin Tarrantino, Christopher Nolan, Woody Allen, and Ridley Scott.
I'm working under the assumption you know and like at least a few movies made by these directors. Not all of them were great movies, but most were very good.
I'm not a huge fan of DiCaprio, and I'm not sure exactly why in particular he is Scorcese's muse like DiNero was, but he has come a long way since 1997. If you can find a role of his to bash in the past 10-15 years, please do that, otherwise its impossible to take criticism of this as yet unreleased movie seriously.
The Revenant is directed by Alejandro González Iñárritu. He is a highly celebrated director and has made some excellent films. I predict this film is going to be a great, very entertaining movie. Some oddball stuff will be wholly inaccurate and fictitious, sure, but this is Hollywood, and meant to be entertaining, not educational.
I'll be seeing it in the theatre.