Electrical Storm can't have been played on past tours as it didn't exist until 2002.
Past pattern says that it will definitely be played. The two other songs made/re-recorded for Best Ofs, The Sweetest Thing and The Hands That Built America, have both been played. Recent songs that were not full album tracks (a single and two bonus tracks) were all played - HMTMKMKM at every Popmart show, Holy Joe once [Pop bonus in Japan], and The Ground Beneath Her Feet [ATYCLB promo in Britain, Australia, and Japan] acoustic at promo shows and some Elevation concerts. What's more, Electrical Storm was a SINGLE. Every single U2 has ever released has been played live. If THTBA, the Best Of 1990-2000 new song that was NOT a single can be played, Electrical Storm is a certainty.
By the way, the U2 single with the least recorded performances is Another Day, with two known concert appearances in 1980. Emphasis on 'known'. We only have setlists for four concerts before the Boy Tour.