I think a lot of responders here are thinking that a new "jazz standard" would be written by a jazz composer for jazz musicians. In my view this is just not how standards work at all. A standard is a popular tune -- one that musicians play on the stand all the time -- and a jazz standard is a standard that jazz musicians play all the time. (There are also, of course, country standards, R&B standards, Latin standards in many flavors, folk standards, bluegrass standards, rock standards, etc.) There are lots of tunes in the RB series written as jazz, but those are not standards. Jazz is the act of adapting and extending tunes rhythmically and harmonically, imho.
Examples of 'non-jazz' tunes I've played in the jazz context that would be jazz standards if more people played them:
Brotherhood of Man
Here Comes the Bride
Hard Times Come No More
Still Crazy After All These Years
Spooky
What's Goin' On
Ain't Gonna Let You Break My Heart Again
Colour My World
It Can't Be Wrong
Everybody's Cryin' Mercy
Here, There and Everywhere
Blackbird
If I Fell
Seduced
Then You Can Tell Me Goodbye
Up from the Skies
And if you really want to hear a great talent surfing the edge between pop and jazz, dig up some Nat King Cole.
Give me any tune and I think I can give it back to you as some kinda jazz.