Barring injuries or a catastrophic loss of form, he's a decent bet to equal or surpass Higuaín's All-Time Serie A record of of 36 goals in a single season. Needs 16 goals in 20 matches to match that figure, which seems doable...especially if Lazio win a bunch of penalties. For reference Pipita had 16 goals after 18 matches in 2015/16, so Immobile is right on track.
An aside: is it unfair to say that none of the Pescara trio ever truly hit their potential? (Insigne, Immobile, Verratti)
Not unfair at all, methinks. Verratti has been a very good player in a competitive team...has a certain magisterial aura, can build like few others and is almost unpressable, but hasn't evidenced an outstanding standard at the very highest stage of club football, and hasn't realized his potential with the Azzurri as a leader and organizer. Narratives can change quickly in football, but as it stands, his progress/career leaves a sour what-if taste in the mouth...comparable to Thiago Alcântara, the other great central midfield talent of the early '90s period. Immobile and Insigne have done really well on the domestic front as scorer and creator, but haven't put their mark on the broader European branch or impacted the national team in a significant way...a bit like Di Natale, who was an exceptional Serie A performer but a bit shy of the top forwards of the era. Then again, it all depends on what your expectations/projections were to begin with — if your bar for Verratti wasn't as high as a Pirlo or Scholes because of his skill set and on-field intellect, then he's probably done quite well for himself at Paris Saint-Germain. Likewise Immobile and Insigne, though they don't have a comparably luxurious platform to embellish or significantly improve their CV in the future (or team-mates like Neymar and Mbappé to fulfill grander objectives).