I like Randy Newman. I also like Deep Purple, but whether they are in the RRHF or not ... Won't buy them another mansion, will it? I'm more interested in their Bob Ezrin produced work coming out in April. I prefer them as working entity (for the few years they still have) rather than a memorial. They already Mount Rushmorized themselves as young men in their twenties with the In Rock cover, to this day one of the most iconic pop art album covers of the time. You could always pick it out in any shop and I remember that even I as a 10 year old was impressed by it though the music at that point - I preferred The Beatles and hard rock was still a few years away for me - still went over my head.
Blackers will see himself confirmed. He despises the RRHF and boycotted DP's last attempt there (some years back, the Bee Gees were inducted that year, all of them were still alive). Roger Glover will be disappointed though, it would have meant something to him.
It's a bit like Kiss, once you have been turned down often enough, it is commemoration enough to not be included.