A number of Welsh players have secured moves during the summer going into the 2026-27 season.
Goalkeeper Karl Darlow left Leeds United to join Manchester United while Harry Wilson, arguably the star performer of the Bellamy era, moved from Fulham to Leeds.
Liverpool youngster Lewis Koumas, who scored his first international goal against Ghana in June, is also expected to secure another loan switch away from Anfield having had spells with Birmingham City and Hull City last season.
“I’ve seen Lewis quite a lot in pre-season, he looks very, very good,” said Rush, who scored 28 times in 73 appearances for his country.
“Harry Wilson, he came on in the second half, he was a major influence for Leeds in beating Liverpool.
“We’re looking forward, but we’ve got to keep it as a team, it’s up to them to do that, but I can see us doing alright.”
Wales start their Nations League campaign against Portugal in Lisbon on 24 September and face Denmark in Copenhagen three days later.
Bellamy’s side then host Norway and Denmark at Cardiff City Stadium in October.
The final two matches of the campaign take place in November with Wales travelling to Norway before hosting Portugal.