It will be on both FUNI/Toonami, but toon will be primary. If it is delayed on CN, the simuldub will also be delayed.
Again, the reason it "makes sense" for FUNimation, because the shear size of the TV demographic. People who (still) watch TV in today's cord-cutting, "(post)Millennial Land", far less likely to also have FUNimation subscription. I know, I used to be "one of those people", myself. But to be fair, the FUNimation service only became viable in the last several years, of course...
Indeed, as the 2017 AS "core viewer" is:
- Is Male
- Likes English
- Not "otaku"
- Does not want to go out of way for a subscription service
- Only watches anime because it happens to be on their TV
- May actually think anime is American, because Cartoon Network is
- Only likes Shonen/Seinen
- Kids with "normie"/conservative parents TV may have limited access to content; parents may not "let them" engage in "other sources". The parents are not self-aware to associate anime on Toonami as "unAmerican"
- Thinks the (non-anime) stuff on AS is "watchable"
And depending on what rating system regime you believe in, the total demos could be 1-2 million on average, up to 3.
Far higher number then active paid FUNimation subs, or even CR 1 million ~ subs. Don't forget other "kids" shows on various TV sources; like Pokemon, pre-Adult Swim CN anime, and their demos, too.
The (legal) dub overall market is always far > Sub. Thus, the "customer" FUNimation would reach on TV with Toonami, is far likely a different customer than its existing subscription user base. Mutually Exclusive.
So, go figure...