Three Goals in just 202 first-half seconds from Maynor Figueroa, Callum McManaman and Jordi Gomez stunned the Toffees, who were looking for back-to-back semi-final appearances.
Martinez has consistently said Premier League survival must always be the Latics' priority, fielding weaker sides in knockout competitions, and no trip to Wembley would deflect that.
"I have said time after time I've made eight or nine changes in the past (in the cup) and since I have arrived at Wigan we want cup success, but not at the expense of the league form," said the Spaniard.
"Making nine or 10 changes is a need in the modern game. The difference now is this season we have a group of 24 players who have shown when they get the opportunity they are competitive.
"If anything this cup run has given us extra players. I think Callum McManaman showed he is ready to play in the league and (goalkeeper) Joel Robles showed a great level of performance.
"This cup success is bringing extra competition into the league campaign and that is what we need to get from this success."
- Sports & Recreation
- Callum McManaman
- Maynor Figueroa