The Expos are currently owned by the League, which placed the franchise in Puerto Rico for 22 of its 81 home games this season.
Now League president Bob DuPuy has confirmed the League's relocation committee is taking steps to plan for 2004 should owners delay on a decision over the franchise's future.
Puerto Rico is expected to once again play host to a number of 'home' games, with Washington and Portland also staging games.
Said DuPuy: "We are evaluating all our options.
"Returning to Puerto Rico is one option. Playing in other cities is also an option."
Ideally, League chiefs hope to confirm plans for the Expos in July, with the team relocating during the off-season, but delays to plans could prompt the need for the fall-back plans.
Earlier this week, a Miami federal judge ruled the League must give former limited partners of the Expos 90-days' notice before moving the club. The limited partners are suing Florida Marlins owner Jeffrey Loria and key MLB officials under a racketeering lawsuit.
It is thought the 90-day notice period could deter possible owners until next season.
