Looking for a Platinum that isn’t too difficult to beat" LEGO Marvel Super Heroes 2 may possibly be it! While it’s hard to tell for sure without knowing the exact contents of the game, it seems you get most of these trophies by playing through the game.
But, you can take a look for yourself, courtesy of PSN Profiles. The LEGO Marvel Super Heroes 2 trophies consist of a Platinum, four Gold trophies, four Silver trophies, and 37 Bronze trophies:
Platinum:

Time to put things right

Collect all the trophies

Gold:

Grandmaster Greetings

Play ”Capture the Infinity Stone” in ‘Grandmaster Mode’
Kang’s for the Memories

Complete ”Out of Time”
EGO the LEGO Planet

Complete ”The Road to Knowhere”
Commotion in the Ocean

Complete ”Torg-nado”
Silver:

By A Horse’s Hair…

Complete ”On Board The Sword”
Road Rage 2

Smash 100 vehicles
We are Groot

Have Groot and Groot (Small) in a party
Comic Book Collector

Unlock and view all Minikit comics

Bronze:

Hello World!

Collect Gwenpool
Journey through time and space

Complete all quests in Chronopolis
‘Nuff Said

Witness the 100% LEGO Stud Fountain
Time Waits For No Kang

Complete all races in Chronopolis
Celestial Selfie

Take a selfie with Eson the Searcher in ”No Eson of Mine”
Challenge Accepted

Complete 10 challenges in Chronopolis
Dog Meet Dog

Have Cosmo and Lockjaw in a party
Operation: Rebirth

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