TheIlluminONI

Nope. 343i and even Microsoft said it themselves, no Split Screen whatsoever. Here's a tweet from Josh Holmes: https://twitter.com/JoshingtonState/status/615282749436358656 and here is an article stating Microsoft confirmed no split screen: http://arstechnica.com/gaming/2015/06/halo-5-listing-dev-statement-point-to-end-of-series-local-multiplayer/ (Its near the end of the article)