Just found an interesting older WOB that seems relevant here:
2dark_22
RAFOed I'm sure, but you said you are planing 2 arcs of 5 books each in Stormlight Archive. Having read all of your published works (and some unpublished:)) I know your storytelling pace is astronomicaly quick. I'm positive you will end current desolation story in the first 5 books, since as I understod, other 5 books will be set in near future in SA universe. So I guess my question is; can you drop any hint will Odium survive to see 6th SA book:)?
Brandon Sanderson
Oh, Odium will survive. Now, whether the one HOLDING that power will survive...that's a different question. (Not quite a RAFO.)
/r/books AMA 2015 (April 8, 2015)
So Odium, the shard, will survive to the 6th book but Rayse may not. Tangential support for this theory and seems to confirm that Odium will not be shattered in the 5th book.