Wut ?
You re mistaken big time. There will be a new Avengers film before 2025 either A5 or New A or Young A whatever it is.
About the profitability of the Avengers films you re mistaken once again.
Lets take a look.
Highest grossing solo MCU films vs Avengers films.
Black Panther
Box office $1346,9 mil (~50% goes to cinema owners)
BO Profit $665 mil
Total cost $300 mil (production & marketing) = $365 mil profit.
Iron Man 3
Box office $1214,8 mil
BO Profit $600 mil
Total cost $350 mil = $250 mil profit
CA 3 Civil War
Box office $1153,3 mil
BO Profit $565 mil
Total cost $350 mil = $215 mil profit
Captain Marvel
Box office $1128,3 mil
BO Profit $555 mil
Total cost $290 mil = $265 mil profit
Guardians of the Galaxy 2
Box office $863,8 mil
BO Profit $430 mil
Total cost $320 mil = $110 mil profit
Thor Ragnarok
Box office $854 mil
BO Profit $425 mil
Total cost $290 mil = $135 mil profit
Guardians of the Galaxy
Box office $773,3 mil
BO Profit $380 mil
Total cost $290 mil = $90 mil profit
CA 2 The Winter Soldier
Box office $714,3 mil
BO Profit $350 mil
Total cost $290 mil = $60 mil profit
Now lets look at the Avengers films.
Avengers 1
Box office $1518,8 mil
BO Profit $750 mil
Total cost $375 mil = $375 mil profit
Avengers AoU
Box office $1405,4 mil
BO Profit $680 mil
Total cost $410 mil = $270 mil profit
Avengers IW
Box office $2048,4 mil
BO Profit $975 mil
Total cost $475 mil = $500 mil profit
Avengers EG
Box office $2797 mil
BO Profit $1300 mil
Total cost $525 mil = $775 mil profit
As you clearly see you dont know what you re talking about.
The Avengers films are the most profitable by far and the only solo movies that come even close are Black Panther and Captain Marvel and both will have an increased budget for their sequel with limited room for box office improvement.
So yes. You re wrong.