Yet, Jackson’s time at Bayern Munich – helping them win the Bundesliga last season – gave him a 21.1% conversion rate, scoring eight goals in 1,004 minutes of game time.
It is why Emery trusts Jackson, but the unknown is being able to gel a new core of players together, however high their potential.
Emery also has to ensure Mbaye – a £47m arrival from Paris St-Germain on deadline day – and Garnacho can provide Jackson the ammunition.
Between them, Watkins and Rogers scored 46% of Villa’s goals in the Premier League last season.
Rogers and Lucas Digne provided 12 assists, with Youri Tielemans adding four and Watkins three.
All four have left, so 18-year-old Mbaye and Chelsea loanee Garnacho will be expected to be the supply line, with Brian Madjo and Tammy Abraham supporting Jackson.
Garnacho has, so far, been kept out by George Hemmings – the 19-year-old is highly rated at Villa Park with Emery calling him “clearly a Premier League player”.
But the academy product only had 25 minutes of top-flight football before this season so expectations must be managed.
Argentina winger Garnacho created six big chances, earning four assists, at Chelsea last term but scored just once.
Mbaye created four goals in 10 starts for PSG last season, helping them win Ligue 1, and was an unused substitute at Hull on Saturday. Emery will expect more from both once they are in tune with his demands.
Emery’s messaging is crucial, which is why it will take time for them to develop into the cohesive unit the manager demands.
His meetings can last anywhere between 90 minutes and two hours, which naturally tests players’ focus levels, but underlines the amount of detail they need to take on board.
To integrate 10 new players, including Jackson, Mbaye and Garnacho, takes time. It is time Emery usually likes to use carefully – but it something he does not have in the current circumstances.
It is why, when he needed players in January, Douglas Luiz returned on loan from Juventus and Abraham arrived from Besiktas.
Luiz knew Emery’s methods and Abraham at least knew the club, although neither deal worked – with Luiz returning to Italy and Emery willing to let Abraham go this summer only for the striker to decide to stay.
Only two summer signings – Jackson and goalkeeper Zion Suzuki – started the draw at Hull and Taylor Harwood-Bellis was left out of the squad, underlining the situation Emery must deal with.
“We must be patient, and we should understand that we are rebuilding the team. Now they must get our way and demands, keeping the same mentality that we built, but with different players,” said Emery.
“Now is no time to think two weeks or three weeks forward.
“We must try to focus on each match. The next match is the Champions League and something we can feel excited and motivated to play because we deserve to be there.
“Now it is to compete in Brugge on Tuesday. Then, we are going to think about the next match at home against Nottingham Forest.
“Each match is a lot of information we can have. We are collecting information individually and collectively about the players, about the structure, about the capacity to build the team.
“Saturday was one point. It was not enough, but I am feeling optimistic about how the players are responding.”
