I mean consider doesn't mean going to do. It's just standard business tactics threaten a competitor so they drop costs.
Also even if this is true, it doesn't seem surprising as the Digital Series Plan is to pump out way more aircraft types fast. NGAD as the same time as an F-16 replacement does seem weird.
The F-16 replacement is for a cheap fighter that can be used in counterinsurgency instead of the F-35. It's also meant to compete in the export market around the time a lot of poor countries today will become rich enough to buy fighter jets, but won't be able to afford the F-35 and higher. Doesn't make sense for the Americans to not have a finger in that pie.
Also, the "F-16 replacement" refers to the F-16V which will make its way out of service in the 2040s. The current F-16s are being replaced by the F-35 on a one-to-one basis.
Dropping 200 F-35s for 200 of the new jet could imply cutting down sustainment costs by 2 times, making the remaining 1500 F-35s more affordable.