The in-form Stoke striker fell out with manager Stephen Keshi at the African Cup of Nations, but may be given another chance.
Keshi said the final 23-man list will be announced on June 2.
The provisional squad will depart Abuja on May 25 for London ahead of the warm-up match against Scotland. Nigeria is expected to play a friendly against Scotland on May 28 before travelling to the United States a day later to complete their final preparations for the June 12-July 13 tournament.
Nigeria will play Argentina, Bosnia and Iran in Group F.
NIGERIA’S PROVISIONAL WORLD CUP SQUAD
Defenders – Elderson Echiejile (Monaco/FRA), Efe Ambrose (Celtic FC/SCO), Godfrey Oboabona (Rizespor/TUR), Azubuike Egwuekwe (Warri Wolves), Kenneth Omeruo (Middlesbrough/ENG), Juwon Oshaniwa (Ashdod FC/ISR), Joseph Yobo (Norwich City/ENG), Kunle Odunlami (Sunshine Stars)
Midfielders – John Mikel Obi (Chelsea/ENG), Ogenyi Onazi (SS Lazio/ITA), Ramon Azeez (Almeria/SPA), Ejike Uzoenyi (Enugu Rangers), Gabriel Reuben (Beveren/BEL), Nosa Igiebor (Real Betis/SPA), Joel Obi (Parma/ITA), Michael Uchebo (Cercle Brugge/BEL), Sunday Mba (CA Bastia/FRA)
Forwards – Ahmed Musa (CSKA Moscow/RUS), Shola Ameobi (Newcastle United/ENG), Victor Moses (Liverpool/ENG), Emmanuel Emenike (Fenerbahce/TUR), Obinna Nsofor (Chievo Verona/ITA), Peter Osaze Odemwingie (Stoke City/ENG), Babatunde Michael (Volyn/UKR), Nnamdi Oduamadi (Varese/ITA), Uche Nwofor (Herenveen/NED).