If anything. This may allow for some modest Aquaman projection initially and give the film the opportunity to blow the industry away if it becomes popular on release in turn making the strategy very successful.
It would also just reinforce to other studios how WB can't be messed with even if it is looking a bit injured at the moment.
Of course that's just one possible scenario out of an infinite amount.
WB is having a good year, they're currently the second highest grossing studio thanks to Ready Player One and Rampage. They're not doing Disney numbers but 2018 is going well for them.