As for the supremacy of Islam in the world and its overcoming all religions...
As for the supremacy of Islam in the world and its overcoming all religions, it is sufficient to pay attention to verses 32 and 33 of Surah at-Tawba, verse 28 of Surah al-Fath, verses 6 and 8 of Surah al-Saff, and numerous other verses. In them, the promise of appearance and true religion’s overcoming all religions has been given, a promise that will come to pass with the appearance of Imam Mahdi (may Allah hasten his return), and this is inviolable.
In regard to the appearance of Imam Mahdi (may Allah hasten his return) in particular, many verses have been elucidated to refer to it, which exceed one hundred verses in all. The book Al-Mahajja fi ma Nazala fi al-Qa’im al-Hujja ( The Final Destination Regarding What Has Been Revealed About the Twelfth Imam ) has collected all of them.
Among those verses is this verse: وَعَدَ اللهُ الَّذِينَ آمَنُوا مِنْكُمْ وَعَمِلُوا الصَّالِحَاتِ لِيَسْتَخْلِفَنَّهُمْ فِي الأَرْضِ كَمَا اسْتَخْلَفَ الَّذِينَ مِنْ قَبْلِهِمْ وَلِيُمَكِّنَنَّ لَهَمُ دِيْنَهُمْ الَّذِي ارْتَضَى لَهُمْ وَلِيُبِدَّلَنَهُم مِنْ بَعْدِ خَوْفِهِمْ أَمْناًا يَعْبُدُونِنِي لاَ يُشْرِكُونَ بِي شَيْئاُ وَمَنْ كَفَرَ بَعْدَ ذَلِكَ فَأُولَئِكَ هُمُ الفَاسِقُونَ “Allah has promised those who have believed among you and do good deeds that He shall certainly make them rulers in the earth as He made rulers those before them and shall make firm for them their religion which He has chosen for them and shall change their fear into security; they will worship Me and associate none with Me, and whoever disbelieves after that, it is they who are the iniquitous.” [^5] and this verse: وَنُرِيدُ أَنْ نَمُنَّ عَلى الَّذِينَ اسْتُضْعِفُوا فِي الأَرْضِ وَنَجْعَلَهُمْ أَئِمَّةً وَنَجْعَلَهُمُ الْوَارِثِينَ “And we desire bestow a favor on those deemed weak in the land and make them leaders and make them inheritors.
”[^6] and the verse: وَلَقَدْ كَتَبْنَا فِي الزَّبُورِ مِنْ بَعْدِ الذِّكْرِ أَنَّ الأَرْضَ يَرِثُهَا عِبَادِي الصَّالِحُونَ “And verily We have written in the Zabur (Psalms) after the Remembrance that my righteous servants will inherit the earth.” [^7] [^1]: Surah Ra’d (13), Verse 7 [^2]: Surah Baqarah (2), Verse 124 [^3]: Surah Yunus (10), Verse 35 [^4]: Surah an-Nisa’ (4), Verse 59 [^5]: Surah Nur (24), Verse 55 [^6]: Surah Qasas (28), Verse 5 [^7]: Surah al-Anbiya’ (21), Verse105 Previous…