promising newcomer; bright new talent
Used for a new person in a field (sports, entertainment, business) who is expected to achieve great things; often implies high potential and media attention.
In this year's draft, he is attracting attention as a promising newcomer.
The actress debuted as a bright new talent.
新人 is a general term for a newcomer or rookie, while 大型新人 specifically emphasizes great promise or high expectations.
有望株 also means a promising person, but is often used in business or investment contexts, whereas 大型新人 is more common in entertainment and sports.
Compound of 大型 (large-scale, big) and 新人 (newcomer). The term likely originated in sports or entertainment journalism to describe a rookie with exceptional potential.