Future Additions to Unicode?

There are various languages, scripts, and characters which have not yet made it into the Unicode standard. If you are interested in where something stands in that regard, the best resource is the Proposed New Scripts page at Unicode.org. There you will currently find about 4 dozen in 4 categories -- Exploratory Stage, Committee Review, ISO Balloting, and Pre-Publication. Another useful page is the Roadmaps of proposed allocations of Unicode codepoints. If you want to see what characters might be added to existing scripts, the right place to look is the Character Pipeline.