Biden/Garland DOJ was protecting Hunter and destroying Trump so Epstein stuff got overshadowed.
Start with jurisdictional issues which span multiple states and countries, each with its own laws, statutes of limitations, and prosecutorial authority. International crimes require extradition and all require determining venue. These matters alone could tie up a case for years. Then there are issues involving double jeopardy and prior plea deals which could face challenges.
The most important consideration will be the weight of the evidence against and the degree of corroboration of same. (ie., housekeepers, staff, etc). Victims who testify (if located and willing to drag their private lives through the mud of public scrutiny) may be understandably reluctant to revive their memories. Guilt beyond a reasonable doubt requires evidence, not mob rage and indignation.
Those screaming out about child abuse would do well instead to focus their ire and concern toward the 400,000 unaccompanied undocumented children who crossed the border for which this government lacks any information as to their whereabouts. You want justice? The perpetrators who created, caused and approved of the invasion are the ones to go after.