With Nacho Monreal and Sead Kolasinac expected to miss the visit of champions City to Emirates Stadium on Sunday, Welbeck has been trialled as a full-back during training.
The Gunners have bolstered their significantly in the off-season with the arrival Matteo Guendouzi, Bernd Leno, Stephan Lichtsteiner, Sokratis Papastathopoulos, Lucas Torreira. Manchester City have not lost touch on their great football, after defeating Chelsea with a victory at the curtain-raising, Community Shield. Playmaker David Silva could also feature after sitting out at Wembley and goalkeeper Ederson will return.
Ainsley Maitland-Niles is likely to start at left-back against Manchester City. City beat the Gunners - home and away - with the minimum of fuss last season. Their defence will be even stronger this season too, especially after the World Cup campaign's Kyle Walker and John Stones had.
Bernardo Silva, who impressed during pre-season in midfield is another option for City to replace Silva. Emery has spent the most part of the preseason drilling his players and infusing in them his footballing philosophies and ideas to help them become a better team.
As his spell in La Liga proved, Emery is not only exceptional in developing young, unpolished talents to produce sublime performances, but he also has the uncanny ability of procuring results in unfavourable situations, especially in matches where his team is deemed as "the underdog".
Arsenal's Pierre-emerick Aubameyang will be eager to make his mark against Manchester City. "I'm not rigid to stick to one formation or way of playing".
Despite last season's stunning achievements, Guardiola was his usual guarded self when talking about City's prospects for the year ahead, believing as many as five other teams could prevent him from becoming the first manager in a decade to retain the title. Bernard Mendy caused a host of problems down the left-hand side and was involved in City's two goals.
As for Arsenal, it is a fresh start for a squad that finished in sixth last season, its worst finish since the 1994-95 season, two years before Arsene Wenger took over as manager.