The versatile Munster, who wore the No1 jersey last season, is the leading contender to play five-eighth with Blake Green having departed for Manly.
Croft, the 19-year-old understudy to Cronk, has been described as a clone of the 2016 Dally M Medallist and Golden Boot-winner, and possesses a strong passing and kicking game to complement his explosive running.
Speedster Josh Addo-Carr will be one of five new recruits in action alongside 2016 Queensland Cup players Ryley Jacks and Tui Kamikamica, who have been promoted from the Storm's feeder club the Sunshine Coast Falcons.
Assistant Adam O'Brien will coach the team with Craig Bellamy to also be on the sidelines overseeing the team's performance.
Melbourne Storm trial squad: 1. Young Tonumaipea, 2. Suliasi Vunivalu, 3. Curtis Scott, 4. Cheyse Blair, 5. Josh Addo-Carr, 6. Cameron Munster, 7. Brodie Croft, 8. Christian Welch, 9. Slade Griffin, 10. Nelson Asofa-Solomona, 11. Kenneath Bromwich (c), 12. Felise Kaufusi, 13. Vincent Leuluai, 14. Ryley Jacks, 15. Jeremy Hawkins, 16. Mark Nicholls, 17. Tui Kamikamica, 18. Dean Britt, 19. Joe Stimson, 20. Justin Olam, 21. Jake Turpin, 22. Scott Drinkwater, 23. Charlie Galo, 24. Dylan Kelly, 25. Jesse Arthars, 26. Linc Port.