According to a leading aviation magazine, the Boeings CEO talked at the Paris Airshow about an all-new aircraft with new technology which already exists, as a replacement for the B737 which could enter service by 2019.
That was at the airshow when Boeing officially said they would not re-engine.
When Boeing announced the 737 re-engine, they stated that they pushed the new aircraft off until
at least mid decade (2025)