Because the interviewer was trash. What's more likely, the interviewer misheard Reeves when he said he turned in parts of the script to WB or they trying to make Reeve's trilogy part of DCU when it's been reported it's Elsewords from Day 1.
What you are saying doesnt even make sense. They have their own plans for DCU Batman already with Brave and the Bold. So are you saying there will be two batmans in the DCU?
If they cancel the Brave and the Bold, then I can see them absorbing Reeves shyt. Until then it seems unlikely