  We discuss a proposal on how gravitational collapse of a NEC (Null Energy
Condition) violating spherically symmetric fluid distribution can avoid the
formation of a zero proper volume singularity and eventually lead to a
Lorentzian wormhole geometry. Our idea is illustrated using a time-evolving
wormhole spacetime in which, we show how a collapsing sphere may never reach a
zero proper volume end-state. The nature of geodesic congruences in such
spacetimes is considered and analyzed. Our construction is inspired from a
recently proposed static wormhole geometry, the multi-parameter Simpson-Visser
line element, which is known to unite wormholes and black holes (regular and
singular) in a single framework.
