On the other hand The Flash is still on, and thankfully there's no indication that they'll pull it because of the upcoming film so their whole policy on the matter is kinda contradictory and confusing.
You can have Arrow without the suicide squad but you can't extract The Flash from The Flash without axing that show. My guess is, while TPTB prefer to not confuse the audience with multiple versions of the same character, they are not willing to scuttle a successful show over it.